Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method for capturing driving circuit error information indicating errors caused by a source driving circuit for driving a light-emitting diode (LED) display panel, wherein the LED display panel comprises at least one pixel circuit, the pixel circuit comprises at least one field-effect transistor (FET) and an LED, the pixel circuit is connected to a data line and a sensing line of the LED display panel, and the method comprises: obtaining LED error information indicating errors caused by the LED of the pixel circuit; driving the LED display panel by the source driving circuit to obtain LED and driving circuit error information indicating errors caused by the LED and a sensing current or a driving current of the source driving circuit; and obtaining driving circuit error information according to the LED error information and the LED and driving circuit error information after the LED error information and the LED and driving circuit error information are obtained respectively, wherein the driving circuit error information indicates errors caused by the sensing current or the driving current of the source driving circuit.
This invention relates to error detection in LED display panels, specifically isolating errors caused by the source driving circuit from those caused by the LED components. The technology addresses the challenge of distinguishing between LED failures and driving circuit malfunctions, which is critical for accurate diagnostics and maintenance of high-resolution displays. The method involves a multi-step error isolation process. First, LED error information is obtained, capturing errors specific to the LED components within the pixel circuits. Each pixel circuit includes at least one field-effect transistor (FET) and an LED, connected to data and sensing lines. Next, the LED display panel is driven by the source driving circuit to collect combined LED and driving circuit error information, which reflects errors from both the LEDs and the sensing or driving currents of the source driving circuit. Finally, the driving circuit error information is derived by comparing the LED error information with the combined LED and driving circuit error information. This isolates errors attributable solely to the source driving circuit, such as current-related faults, from those caused by the LEDs themselves. The approach enables precise identification of driving circuit failures, improving display reliability and reducing unnecessary component replacements.
2. The method according to claim 1 , wherein the step of obtaining the LED error information comprises: recording the LED error information in a look-up table.
This invention relates to error handling in LED (light-emitting diode) systems, specifically addressing the challenge of efficiently capturing and managing LED error data to improve system diagnostics and reliability. The method involves obtaining LED error information by recording it in a look-up table, which allows for structured storage and quick retrieval of error data. The look-up table organizes error codes, failure modes, or other relevant LED error details, enabling system operators to identify and address issues more effectively. This approach enhances troubleshooting by providing a centralized reference for error patterns, reducing downtime, and improving maintenance efficiency. The recorded error information can include details such as voltage fluctuations, current anomalies, or thermal failures, which are critical for diagnosing LED performance degradation or outright failures. By storing this data in a look-up table, the system can automate error detection and response, ensuring timely corrective actions. This method is particularly useful in applications where LED reliability is critical, such as automotive lighting, industrial displays, or medical devices, where consistent performance is essential. The look-up table can be updated dynamically as new error patterns are detected, ensuring the system remains adaptive to evolving failure modes. This structured error management approach improves overall system robustness and reduces the need for manual intervention.
3. The method according to claim 1 , wherein the step of obtaining the LED and driving circuit error information comprises: recording the LED and driving circuit error information in a look-up table.
This invention relates to error detection and management in LED lighting systems, specifically addressing the challenge of efficiently capturing and utilizing error data from LEDs and their associated driving circuits. The method involves obtaining error information from the LEDs and driving circuits, which is then recorded in a look-up table for reference. The look-up table serves as a structured database that stores error codes, failure patterns, or diagnostic data, enabling quick retrieval and analysis. This approach improves system reliability by allowing for automated error identification, troubleshooting, and predictive maintenance. The recorded data can be used to trigger corrective actions, such as adjusting power supply parameters or replacing faulty components, thereby enhancing the overall performance and longevity of the LED lighting system. The look-up table may also be updated dynamically as new error conditions are detected, ensuring the system remains adaptive to evolving failure modes. This method is particularly useful in large-scale LED installations where real-time monitoring and error resolution are critical for maintaining operational efficiency.
4. The method according to claim 1 , wherein the step of obtaining the driving circuit error information comprises: recording the driving circuit error information in a look-up table.
A method for managing driving circuit errors in electronic systems involves recording error information in a look-up table to facilitate error detection and correction. The method addresses the problem of identifying and mitigating faults in driving circuits, which are critical components in power management and signal transmission. Driving circuits, such as those used in motor control, display drivers, or power converters, are prone to errors due to environmental factors, component degradation, or manufacturing defects. These errors can lead to system malfunctions, reduced efficiency, or complete failure. The method includes obtaining error information from the driving circuit, which may involve monitoring voltage, current, temperature, or other operational parameters. This error information is then recorded in a look-up table, which serves as a structured database for storing error codes, error conditions, and corresponding corrective actions. The look-up table allows for quick retrieval and analysis of error data, enabling real-time or scheduled error handling. By storing error information in this manner, the system can efficiently diagnose recurring issues, apply predefined fixes, or trigger alerts for maintenance. The use of a look-up table enhances error management by providing a centralized reference for error data, reducing the need for complex diagnostic algorithms. This approach improves system reliability, reduces downtime, and simplifies troubleshooting. The method is applicable to various electronic systems where driving circuits are integral, including industrial automation, consumer electronics, and automotive systems.
5. The method according to claim 1 , wherein the step of obtaining the LED error information comprises: obtaining FET error information by driving the pixel circuit, wherein the FET error information indicates errors caused by the at least one FET of the pixel circuit; and obtaining the LED error information indicating errors caused by the LED of the pixel circuit when an error compensation for the at least one FET is completed by using the FET error information.
This invention relates to error compensation in pixel circuits, particularly for display systems using light-emitting diodes (LEDs) and field-effect transistors (FETs). The problem addressed is the accurate detection and compensation of errors in both the LED and FET components of a pixel circuit, which can degrade display performance. The method involves obtaining error information for both the FET and LED components of a pixel circuit. First, the pixel circuit is driven to acquire FET error information, which indicates errors caused by the FET(s) in the circuit. This FET error information is then used to perform error compensation for the FET. Once the FET compensation is completed, the method proceeds to obtain LED error information, which reflects errors caused by the LED itself. By compensating for FET errors before measuring LED errors, the method ensures that the LED error information is not distorted by FET-related inaccuracies, leading to more precise overall error compensation in the pixel circuit. This approach improves the accuracy and reliability of display systems by isolating and addressing errors in each component separately.
6. The method according to claim 5 , wherein the step of obtaining the FET error information comprises: controlling the source driving circuit to sense the at least one FET so as to obtain the FET error information, wherein the LED is controlled not to emit light.
This invention relates to a method for detecting errors in field-effect transistors (FETs) used in light-emitting diode (LED) driving circuits. The problem addressed is the need to accurately identify FET failures without disrupting LED operation, ensuring reliable performance in LED systems. The method involves obtaining FET error information by controlling a source driving circuit to sense the FETs while ensuring the LED does not emit light during the sensing process. This prevents interference from LED operation, allowing precise detection of FET errors. The method may also include steps to determine the type of FET error, such as open-circuit or short-circuit conditions, by analyzing the sensed data. Additionally, the method may involve adjusting the driving circuit parameters based on the detected errors to maintain system stability. The invention ensures that FET errors are detected without affecting LED functionality, improving system reliability and reducing downtime. The method is particularly useful in applications where uninterrupted LED operation is critical, such as in lighting systems or display technologies. By isolating the sensing process from LED emission, the method provides accurate error detection while maintaining system performance.
7. The method according to claim 6 , wherein the step of controlling the source driving circuit comprises: providing a test voltage through the data line to drive the pixel circuit and measuring a corresponding voltage through the sensing line; and obtaining the FET error information indicating errors caused by the at least one FET based on a relation between the test voltage and the corresponding voltage.
This invention relates to a method for detecting errors in field-effect transistors (FETs) within a pixel circuit of a display panel. The method addresses the challenge of accurately identifying and quantifying performance deviations in FETs, which can degrade display quality. The process involves applying a test voltage to a data line connected to the pixel circuit, which drives the circuit and induces a measurable response. A sensing line captures the resulting voltage, and the relationship between the applied test voltage and the measured voltage is analyzed to determine FET error information. This error information reflects deviations caused by the FETs, such as threshold voltage shifts or mobility variations, which can impair pixel performance. The method enables precise error detection, allowing for calibration or compensation to maintain display accuracy. The technique is particularly useful in active-matrix organic light-emitting diode (AMOLED) displays, where FET reliability is critical for consistent brightness and color fidelity. By isolating and quantifying FET errors, the method supports improved display manufacturing and longevity. The approach leverages existing display panel infrastructure, including data and sensing lines, to streamline error detection without requiring additional hardware. This enhances efficiency and reduces costs in display production and maintenance.
8. The method according to claim 6 , wherein the at least one FET comprises a switching FET coupled between the data line of the LED display panel and the LED, and a sensing FET coupled between the sensing line of the LED display panel and the switching FET, and the step of controlling the source driving circuit to sense the at least one FET comprises: turning on the sensing FET and turning off the switching FET.
This invention relates to LED display panels and specifically to a method for sensing and controlling field-effect transistors (FETs) used in driving and monitoring LEDs. The problem addressed is the need for accurate and efficient sensing of electrical characteristics of FETs in LED display panels to ensure proper operation and longevity of the display. The method involves using at least one FET in the display panel, which includes a switching FET connected between a data line of the LED display panel and an LED, and a sensing FET connected between a sensing line of the LED display panel and the switching FET. The sensing FET is turned on while the switching FET is turned off to allow the source driving circuit to sense the electrical characteristics of the FETs. This configuration enables the detection of parameters such as voltage, current, or resistance, which can be used to monitor the health and performance of the FETs and the LEDs they drive. The sensing process helps in identifying potential failures or degradation in the FETs, allowing for timely adjustments or replacements to maintain display quality. The method ensures reliable operation of the LED display panel by providing a way to continuously monitor and control the FETs without disrupting the normal display function.
9. The method according to claim 5 , wherein the step of obtaining the LED error information comprises: compensating original test data by using the FET error information to generate compensated test data; controlling the source driving circuit to drive the LED display panel based on the compensated test data; and performing an optical measurement to sense the LED so as to obtain the LED error information.
This invention relates to a method for improving the accuracy of LED display panel testing by compensating for errors introduced by field-effect transistors (FETs) in the source driving circuit. The problem addressed is the distortion or inaccuracies in LED test data caused by FET errors, which can lead to unreliable optical measurements and defective panel identification. The method involves obtaining LED error information by first compensating original test data using known FET error information to generate compensated test data. The source driving circuit, which includes FETs, is then controlled to drive the LED display panel based on this compensated test data. An optical measurement is performed to sense the LED's response, and the resulting data is used as the LED error information. This process ensures that the measured LED errors are isolated from any distortions caused by the FETs, providing more accurate error detection. The source driving circuit is responsible for supplying power to the LED display panel, and the FETs within it can introduce errors due to variations in their electrical characteristics. By compensating the test data before driving the panel, the method effectively normalizes the input signals, allowing the optical measurement to reflect only the true LED performance. This approach enhances the reliability of LED defect detection and improves the overall quality control process for LED display panels.
10. The method according to claim 9 , wherein the step of controlling the source driving circuit to drive the LED display panel comprises: providing a compensated test voltage corresponding to the compensated test data through the data line to drive the pixel circuit.
The invention relates to driving circuits for LED display panels, specifically addressing the challenge of accurately controlling pixel circuits to compensate for variations in display performance. The method involves adjusting the driving signals to account for inconsistencies in the LED display panel, ensuring uniform brightness and color accuracy across the display. The process includes generating compensated test data based on detected variations in the panel's performance, such as differences in LED characteristics or environmental factors. This compensated test data is then used to modify the driving signals sent to the pixel circuits via data lines. The method further includes applying a compensated test voltage to the pixel circuits, which is derived from the compensated test data, to drive the LEDs with precise control. This ensures that each pixel is driven with the correct voltage to achieve the desired brightness and color output, compensating for any inherent or environmental variations in the display panel. The technique improves display uniformity and reliability by dynamically adjusting the driving signals in real-time.
11. The method according to claim 9 , wherein the step of performing the optical measurement comprises: measuring the LED display panel by an optical instrument to generate optical test data of the LED; and obtaining the LED error information indicating errors caused by the LED based on the optical test data.
This invention relates to optical testing of LED display panels to identify and analyze LED errors. The method involves using an optical instrument to measure the LED display panel, generating optical test data that captures the performance characteristics of the LEDs. The optical test data is then processed to derive LED error information, which identifies defects or malfunctions in the LEDs, such as brightness variations, color inconsistencies, or dead pixels. The optical measurement step is part of a broader testing process that may include additional steps like pre-processing the test data, comparing it against reference data, or classifying the errors. The optical instrument may be a camera, spectrometer, or other device capable of capturing light output from the LEDs. The error information can be used for quality control, calibration, or repair of the LED display panel. The method ensures accurate detection of LED defects by leveraging precise optical measurements and data analysis techniques.
12. The method according to claim 9 , wherein the at least one FET comprises a switching FET coupled between the data line of the LED display panel and the LED, and a sensing FET coupled between the sensing line of the LED display panel and the switching FET, and the step of controlling the source driving circuit to drive the LED display panel comprises: sequentially turning on and turning off the sensing FET; and turning off the switching FET.
This invention relates to driving and sensing techniques for LED display panels, particularly addressing the need for efficient control and monitoring of LED current in display systems. The method involves using field-effect transistors (FETs) to manage the electrical connection between the data lines of the LED display panel and the LEDs themselves, while also enabling current sensing for diagnostic or calibration purposes. The system employs at least one FET, which includes a switching FET and a sensing FET. The switching FET is connected between the data line of the LED display panel and the LED, allowing current to flow when activated. The sensing FET is coupled between the sensing line of the LED display panel and the switching FET, facilitating current measurement or monitoring. The driving process involves sequentially turning the sensing FET on and off, while the switching FET remains turned off during this operation. This configuration allows for precise control of the LED current and enables accurate sensing of the current flowing through the LED, which can be used for adjusting display brightness, detecting faults, or compensating for variations in LED characteristics. The method ensures efficient power management and reliable performance in LED display applications.
13. The method according to claim 1 , wherein the step of obtaining the LED and driving circuit error information comprises: controlling the source driving circuit to drive the LED display panel so as to turn on all of the at least one FET of the LED display panel; and performing an optical measurement to sense the LED so as to obtain the LED and driving circuit error information.
This invention relates to a method for detecting errors in LED display panels and their associated driving circuits. The method addresses the challenge of identifying defects in LED displays, which can arise from issues in the LEDs themselves or in the driving circuits that control them. The invention provides a systematic approach to diagnose these errors by leveraging optical measurements and circuit control. The method involves driving the LED display panel using a source driving circuit to activate all field-effect transistors (FETs) in the panel. By turning on all FETs, the system ensures that each LED is powered, allowing for comprehensive error detection. An optical measurement is then performed to sense the LEDs, capturing data that reveals any discrepancies in brightness, color, or other optical characteristics. This data is analyzed to obtain error information for both the LEDs and the driving circuits, enabling precise identification of faults. The technique ensures that errors in the driving circuits, such as faulty FETs or signal issues, are detected alongside LED-specific defects like dead pixels or uneven illumination. By combining circuit control with optical sensing, the method provides a robust solution for diagnosing LED display panel failures, improving manufacturing quality and maintenance efficiency.
14. The method according to claim 13 , wherein the step of controlling the source driving circuit to drive the LED display panel comprises: driving the LED by the source driving circuit by providing a driving current to the data line.
The invention relates to driving circuits for LED display panels, specifically addressing the challenge of efficiently controlling LED brightness and power consumption. The method involves a source driving circuit that regulates the current supplied to the data lines of an LED display panel. This circuit adjusts the driving current to control the brightness of individual LEDs, ensuring uniform illumination and reducing power waste. The driving current is precisely modulated to match the desired brightness levels, which can be dynamically adjusted based on input signals or environmental conditions. The method also includes compensating for variations in LED characteristics, such as aging or temperature effects, to maintain consistent performance over time. By optimizing the current delivery to each LED, the system improves energy efficiency and extends the lifespan of the display panel. The driving circuit may incorporate feedback mechanisms to monitor and adjust the current in real-time, ensuring accurate brightness control. This approach is particularly useful in high-resolution displays where precise and stable LED operation is critical. The invention enhances display quality while minimizing power consumption, making it suitable for applications requiring long-term reliability and energy efficiency.
15. The method according to claim 13 , wherein the step of performing the optical measurement to sense the LED comprises: measuring the LED display panel by an optical instrument to generate optical data; and obtaining the LED and driving circuit error information based on the optical data.
This invention relates to optical measurement techniques for diagnosing errors in LED display panels and their driving circuits. The technology addresses the challenge of accurately detecting and identifying defects in LED displays, which can arise from faulty LEDs, damaged driving circuits, or other electrical or optical issues. Traditional inspection methods may lack precision or require complex setups, leading to inefficiencies in manufacturing and maintenance. The method involves using an optical instrument to capture optical data from an LED display panel. The optical data is then analyzed to extract error information related to the LEDs and their associated driving circuits. This process enables the identification of specific defects, such as malfunctioning LEDs or circuit failures, by evaluating the optical characteristics of the display. The optical measurement step is a critical part of a broader diagnostic process that may include additional steps, such as electrical testing or data processing, to ensure comprehensive error detection. By leveraging optical measurements, the method provides a non-invasive and efficient way to assess the integrity of LED displays, improving quality control and reducing downtime in production or maintenance workflows. The approach is particularly useful in high-resolution or large-scale LED applications where traditional inspection techniques may be less effective.
16. The method according to claim 1 , wherein the step of obtaining the LED and driving circuit error information comprises: controlling the source driving circuit to sense the LED so as to obtain the FET error information, wherein all of the at least one FET is turned on.
This invention relates to error detection in LED display systems, specifically addressing the challenge of identifying faults in field-effect transistors (FETs) used to drive LEDs. The method involves a diagnostic process where a source driving circuit is controlled to sense the LEDs while all FETs in the system are in an active (turned-on) state. By monitoring the electrical characteristics of the LEDs under these conditions, the system can detect anomalies or errors in the FETs, such as open circuits, short circuits, or other malfunctions. This approach ensures that the integrity of the driving circuitry is verified, preventing display errors or failures in LED-based systems. The technique is particularly useful in large-scale LED displays where individual component failures can lead to visible defects. The method leverages the driving circuit's sensing capabilities to perform real-time diagnostics, improving reliability and reducing maintenance downtime. The invention focuses on ensuring accurate error detection by standardizing the FET state during sensing, which enhances the precision of fault identification. This solution is applicable in various LED display applications, including digital signage, video walls, and other high-resolution display technologies.
17. The method according to claim 16 , wherein the step of controlling the source driving circuit to sense the LED so as to obtain the FET error information comprises: driving the LED by the source driving circuit by providing a voltage to the data line; measuring a sensing current through the sensing line and converting the sensing current into optical data; and obtaining the LED and driving circuit error information based on the optical data.
This invention relates to a method for sensing and diagnosing errors in light-emitting diode (LED) displays, particularly in systems where LEDs are driven by field-effect transistor (FET) circuits. The problem addressed is the need for accurate and efficient detection of LED and driving circuit malfunctions to ensure display reliability and performance. The method involves driving an LED by applying a voltage to a data line connected to the LED. A sensing current is then measured through a sensing line coupled to the LED, and this current is converted into optical data. The optical data is analyzed to derive error information related to both the LED and the driving circuit. This process helps identify issues such as LED degradation, open/short circuits, or FET malfunctions, enabling timely corrective actions. The method ensures precise error detection by leveraging the relationship between the applied voltage, the measured sensing current, and the resulting optical output. By comparing the optical data against expected values, deviations can be attributed to specific components, improving diagnostic accuracy. This approach is particularly useful in large-scale LED displays where individual component failures can degrade overall performance. The technique enhances system reliability by providing real-time feedback on LED and FET health, allowing for proactive maintenance and reducing downtime.
18. The method according to claim 1 , wherein the step of obtaining the driving circuit error information comprises: removing an LED error component indicted by the LED error information from the LED and driving circuit error information so as to obtain the driving circuit error information.
This invention relates to error detection and correction in LED lighting systems, specifically addressing the challenge of isolating and identifying errors originating from the driving circuit versus those from the LED components. In LED systems, errors can arise from either the LED itself or the driving circuit, and distinguishing between these sources is critical for accurate diagnostics and maintenance. The method involves obtaining combined error information from both the LED and the driving circuit, then processing this data to separate the LED-specific errors from the driving circuit errors. This is achieved by removing the LED error component, as indicated by pre-existing LED error information, from the combined error data. The result is isolated driving circuit error information, which allows for precise identification of circuit-related faults without interference from LED errors. This approach improves diagnostic accuracy, reduces false error reports, and enables targeted troubleshooting of driving circuit issues in LED lighting systems. The method is particularly useful in applications where reliable error detection is essential, such as in industrial lighting, automotive systems, or smart lighting networks. By isolating the driving circuit errors, maintenance personnel can quickly pinpoint and address circuit malfunctions, ensuring optimal performance and longevity of the LED system.
19. A driving circuit for driving a light-emitting diode (LED) display panel, wherein the LED display panel comprises at least one pixel circuit, the pixel circuit comprises at least one field-effect transistor (FET) and an LED, the pixel circuit is connected to a data line of the LED display panel and a sensing line of the LED display panel, and the driving circuit comprises: a timing controller circuit, configured to control a source driving circuit to drive the data line of the LED display panel and sense the sensing line of the LED display panel, wherein in a detection operation period, the timing controller circuit is configured to: obtain driving circuit error information indicating errors caused by a driving current or a sensing current of the source driving circuit; obtain original LED sensing data from the source driving circuit; and compensate the original LED sensing data based on the driving circuit error information to generate LED error information indicating errors caused by the LED of the pixel circuit.
This invention relates to a driving circuit for an LED display panel, addressing inaccuracies in LED sensing due to errors in the driving and sensing currents. The LED display panel includes pixel circuits, each containing at least one field-effect transistor (FET) and an LED, connected to a data line and a sensing line. The driving circuit comprises a timing controller circuit that manages a source driving circuit to drive the data line and sense the sensing line. During a detection operation period, the timing controller circuit obtains driving circuit error information, which reflects errors introduced by the driving or sensing currents of the source driving circuit. It also retrieves original LED sensing data from the source driving circuit. The timing controller then compensates the original LED sensing data using the driving circuit error information to generate LED error information, which indicates errors specific to the LED within the pixel circuit. This compensation process improves the accuracy of LED sensing by isolating and correcting errors caused by the driving circuit, ensuring more precise LED performance monitoring and calibration. The invention enhances display quality by mitigating inaccuracies in current-based sensing operations.
20. The driving circuit according to claim 19 , wherein the obtaining of the driving circuit error information comprises referring to a look-up table recording the driving circuit error information.
A driving circuit is designed to monitor and correct errors in its operation to ensure reliable performance. The circuit includes a detection module that identifies errors in the driving signals or operational parameters, such as voltage, current, or timing discrepancies. These errors may arise from component degradation, environmental factors, or manufacturing variations. The circuit also includes a correction module that adjusts the driving signals or operational parameters based on the detected errors to maintain desired performance levels. The correction may involve modifying signal amplitudes, phase shifts, or other adjustments to compensate for the errors. To enhance accuracy and efficiency, the driving circuit uses a look-up table that stores pre-determined error information. This table contains data mapping specific error conditions to corresponding correction values, allowing the circuit to quickly retrieve and apply the appropriate adjustments. The look-up table may be pre-populated during manufacturing or updated dynamically based on real-time error detection. By referencing this table, the circuit can reduce computational overhead and improve response time to errors, ensuring consistent and reliable operation. The use of a look-up table simplifies the error correction process and improves the overall robustness of the driving circuit.
21. The driving circuit according to claim 19 , wherein the timing controller is further configured to update a look-up table to record the LED error information in the look-up table which has original LED error information.
A driving circuit for light-emitting diodes (LEDs) includes a timing controller that monitors and records LED error information. The circuit is designed to manage and correct errors in LED operation, such as brightness variations or failures, to ensure consistent performance. The timing controller updates a look-up table that stores original LED error data, allowing for real-time adjustments and error tracking. This system enhances reliability by dynamically addressing LED discrepancies, improving display quality and longevity. The look-up table serves as a reference for error correction, enabling the circuit to compensate for individual LED variations. The overall design focuses on maintaining optimal LED performance by continuously updating error records and applying corrective measures. This approach is particularly useful in applications requiring high precision, such as digital displays or lighting systems, where consistent output is critical. The circuit's ability to adapt to LED errors ensures long-term stability and efficiency.
22. The driving circuit according to claim 19 , wherein the timing controller is further configured to compensate original pixel data based on the LED error information in a normal operation period.
This invention relates to a driving circuit for light-emitting diode (LED) displays, specifically addressing the problem of LED performance variations that degrade display quality. The circuit includes a timing controller that adjusts pixel data to compensate for LED errors, such as brightness or color inconsistencies, during normal operation. The timing controller receives LED error information, which may be obtained through pre-characterization or real-time monitoring, and modifies the original pixel data to correct these errors. This compensation ensures uniform display performance across the LED array. The circuit may also include a data driver that processes the compensated pixel data and a scan driver that controls the timing of LED activation. The timing controller dynamically adjusts the pixel data in real-time to maintain consistent display quality, addressing issues like aging, manufacturing defects, or environmental factors affecting LED performance. The invention improves display uniformity and longevity by actively compensating for LED variations during normal operation.
23. A driving circuit for driving a light-emitting diode (LED) display panel, wherein the LED display panel comprises at least one pixel circuit, the pixel circuit comprises at least one field-effect transistor (FET) and an LED, the pixel circuit is connected to a data line of the LED display panel and a sensing line of the LED display panel, and the driving circuit comprises: a timing controller circuit, configured to control a source driving circuit to drive the data line of the LED display panel and sense the sensing line of the LED display panel, wherein in a normal operation period, the timing controller circuit is configured to: obtain first LED error information indicating errors caused by the LED of the pixel circuit, wherein the first LED error information is generated and stored or updated in a detection operation period before the normal operation period; obtain original pixel data; compensate the original pixel data by using the first LED error information to generate compensated pixel data; and provide the compensated pixel data to the source driving circuit such that the source driving circuit drives the LED display panel according to the compensated pixel data.
This invention relates to a driving circuit for an LED display panel, addressing the problem of LED aging and performance degradation over time. The circuit compensates for LED errors to maintain consistent display quality. The LED display panel includes pixel circuits, each containing at least one field-effect transistor (FET) and an LED, connected to data and sensing lines. The driving circuit comprises a timing controller that manages a source driving circuit to drive the data lines and sense the sensing lines. During normal operation, the timing controller obtains stored LED error information from a prior detection period, which indicates performance deviations in the LEDs. It then retrieves original pixel data, compensates it using the error information to generate corrected pixel data, and sends this data to the source driving circuit. The source driving circuit then drives the LED display panel based on the compensated data, ensuring accurate and consistent brightness and color output despite LED aging. The detection period, occurring before normal operation, generates and updates the LED error information used for compensation. This approach improves display longevity and reliability by dynamically adjusting for LED degradation.
24. The driving circuit according to claim 23 , wherein the timing controller circuit is further configured to obtain second LED error information indicating errors caused by the LED of the pixel circuit in the normal operation period, wherein the second LED error information is obtained and stored for being used by the timing controller circuit before the detection operation period, and the timing controller circuit is further configured to compensate the original pixel data further by the second LED error information to generate the compensated pixel data.
This invention relates to a driving circuit for a display device, specifically addressing errors in light-emitting diode (LED) performance during normal operation. The circuit includes a timing controller that compensates pixel data to correct for LED errors, improving display accuracy. The timing controller obtains second LED error information, which indicates errors caused by the LED in a pixel circuit during normal operation. This error information is collected and stored before a detection operation period, allowing the timing controller to use it to further compensate the original pixel data. The compensation process generates adjusted pixel data that accounts for the LED errors, ensuring more accurate and consistent display output. The circuit also includes a data driver that converts the compensated pixel data into a driving signal for the pixel circuit, and a detection circuit that measures LED errors during a detection operation period. The timing controller uses this additional error information to refine the compensation process, enhancing display performance. The overall system dynamically adjusts pixel data to mitigate LED-related inaccuracies, improving image quality in display applications.
25. The driving circuit according to claim 24 , wherein the timing controller circuit is further configured to obtain FET error information in the normal operation period, wherein the FET error information indicates errors caused by the at least FET of the pixel circuit and is obtained and stored for being used by the timing controller circuit before the detection operation period, and the timing controller circuit is further configured to compensate the original pixel data further by the FET error information to generate the compensated pixel data.
A driving circuit for a display device includes a timing controller circuit that processes pixel data to drive a display panel. The display panel comprises pixel circuits, each containing at least one field-effect transistor (FET) that may introduce errors during operation. The timing controller circuit compensates for these errors to improve display accuracy. During normal operation, the timing controller obtains FET error information, which reflects errors caused by the FETs in the pixel circuits. This error information is collected and stored before a detection operation period, allowing the timing controller to use it later. The timing controller then compensates the original pixel data by applying the FET error information, generating corrected pixel data to mitigate display inaccuracies. This compensation process enhances the overall performance and reliability of the display by accounting for variations or defects in the FETs. The system ensures that the display output remains consistent and accurate by dynamically adjusting the pixel data based on pre-determined error profiles.
26. The driving circuit according to claim 23 , wherein the timing controller circuit is further configured to obtain FET error information in the normal operation period, wherein the FET error information indicates errors caused by the at least FET of the pixel circuit and is obtained and stored for being used by the timing controller circuit before the detection operation period, and the timing controller circuit is further configured to compensate the original pixel data further by the FET error information to generate the compensated pixel data.
This invention relates to a driving circuit for a display device, specifically addressing errors in thin-film transistor (FET) devices within pixel circuits that degrade display performance. The driving circuit includes a timing controller circuit that compensates pixel data to correct for these errors, improving image quality. During normal operation, the timing controller obtains FET error information, which reflects distortions or malfunctions in the FETs of the pixel circuits. This error data is collected and stored before a dedicated detection operation period, allowing the system to preemptively adjust pixel data. The timing controller then uses this stored error information to further refine the original pixel data, generating compensated pixel data that accounts for the FET errors. This compensation process ensures that the display output remains accurate and consistent, mitigating issues like brightness variations or color inaccuracies caused by faulty FETs. The invention enhances display reliability by dynamically correcting errors without requiring additional hardware, leveraging pre-stored error data for real-time adjustments.
27. The driving circuit according to claim 23 , wherein during the obtaining of the first LED error information, the timing controller circuit is configured to refer to a look-up table recording the first LED error information.
A driving circuit for LED displays addresses the challenge of accurately detecting and correcting LED errors to maintain display quality. The circuit includes a timing controller circuit that obtains error information for individual LEDs, such as open-circuit or short-circuit conditions, and adjusts the display output accordingly. The timing controller circuit is configured to refer to a look-up table that records the first LED error information, allowing for quick and efficient error detection. This look-up table stores predefined error data, enabling the circuit to identify and compensate for LED failures without extensive real-time processing. The driving circuit may also include a data processing circuit that generates compensation data based on the error information, ensuring that the display output remains consistent despite the presence of faulty LEDs. The system dynamically adjusts the driving signals to mitigate the visual impact of errors, improving overall display performance and reliability. This approach enhances error detection efficiency and reduces computational overhead, making it suitable for high-resolution and large-scale LED displays.
28. The driving circuit according to claim 27 , wherein the timing controller circuit is further configured to update the look-up table by using the first LED error information in the detection operation period before the normal operation period.
A driving circuit for light-emitting diodes (LEDs) includes a timing controller circuit that manages the operation of the LEDs. The circuit is designed to address inconsistencies in LED performance, such as variations in brightness or color, which can occur due to manufacturing tolerances, aging, or environmental factors. The timing controller circuit uses a look-up table to adjust driving parameters, such as current or voltage, to compensate for these inconsistencies and ensure uniform output. During a detection operation period, the circuit detects LED error information, such as deviations in voltage, current, or temperature, which may indicate performance issues. The timing controller circuit then updates the look-up table based on this error information before entering a normal operation period. This update process allows the circuit to dynamically adjust driving parameters in real-time, improving LED performance and longevity. The look-up table stores pre-determined compensation values that correspond to specific error conditions, enabling precise adjustments to maintain consistent LED output. The circuit may also include a current source for driving the LEDs and a voltage detector for monitoring LED voltage levels. The timing controller circuit coordinates these components to ensure accurate detection and compensation. By continuously updating the look-up table, the driving circuit can adapt to changing conditions, reducing the need for manual calibration and enhancing overall system reliability.
29. The driving circuit according to claim 28 , wherein in the detection operation period, before the look-up table is updated by using the first LED error information, the timing controller circuit is further configured to: obtain driving circuit error information indicating errors caused by a driving current or a sensing current of the source driving circuit; obtain original LED sensing data from the source driving circuit; and compensate the original LED sensing data based on the driving circuit error information to generate the first LED error information.
This invention relates to a driving circuit for light-emitting diodes (LEDs) in display systems, specifically addressing inaccuracies in LED current sensing due to errors in the driving circuit itself. The driving circuit includes a timing controller circuit that performs a detection operation to update a look-up table used for LED current compensation. Before updating the look-up table with LED error information, the timing controller circuit obtains error information from the driving circuit, which reflects inaccuracies in the driving or sensing currents. The circuit then retrieves original LED sensing data from the source driving circuit and compensates this data based on the driving circuit error information to generate corrected LED error information. This ensures that the look-up table updates are based on accurate LED measurements, improving the overall precision of current compensation in the display system. The invention enhances display performance by mitigating errors introduced by the driving circuit during LED current sensing, leading to more consistent and reliable LED operation.
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April 14, 2020
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